🐘 PHP & MySQL Database
PHP can talk to databases like MySQL to store and fetch data dynamically.
📝 Example: Connect & Query a Database
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📖 Key Database Concepts
new mysqli(host, username, password, dbname) connects to the MySQL server.- Always check for connection errors with
connect_error.
- Use
query() to run SQL commands.
fetch_assoc() gets each row as an associative array.- Always close the connection with
close().
💡 Tip: Never trust user input — always sanitize or use prepared statements to avoid SQL injection.